This is so interesting. Thank you for sharing. ?Many women start losing estrogen (all at once) quite early, in their 40's. Men don't start losing testosterone until much later, and they don't lose it all at once, but very gradually, and still can have sex when they are 80. Not so with most women unless they get bio-identical hormone replacement. And still, women are told that estrogen causes cancer. Men aren't told that testosterone supplementation causes cancer. Plus men have made viagra, etc., to help them. The help that women have is estradiol and a little testosterone. But this is frowned on, and it's very difficult to find a doctor who understands hormones and who will prescribe bio-identical hormones. Doctors don't know enough about women's hormones, but they all have heard about the large study of Women's Health Initiatives, the results of which showed that women on HRT showed an increase in breast cancer, etc. However, very few doctors seem to know that the WHI study used Premarin (horse urine estrogens) and Progestin (a synthetic compound). Prempro (a combination of estrogen and medroxy-progesterone) was the kind of HRT used in the WHI study. The study did not use bio-identical hormones. Progestin is not the same as bio-identical progesterone; neither is Premarin the same as compounded E2 (Estradiol as it exists in the body). Premarin contains at least 10 forms of estrogen, including estradiol, but it also has equilin, and is approved and regulated by the FDA.